Spool holder



FIG. 1 is a perspective view of the spool holder showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof, the opposite side beingidentical;

FIG. 6 is a rear elevational view thereof.

The ornamental design for a spool holder, substantially as shown anddescribed.